package com.itheima.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.entity.Employee;
import com.itheima.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

import static com.baomidou.mybatisplus.core.toolkit.Wrappers.lambdaQuery;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;


    /*
    * 员工登录
    * */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){

        //将前端提交的密码进行加密:md5
        String password = employee.getPassword();
        String passwordMd5 = DigestUtils.md5DigestAsHex(password.getBytes());

        //根据页面提交的用户名查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());//mybatis-plus内容
        //Employee emp =  employeeService.select(employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //如果没有查询到则返回登录失败结果
        if (emp == null){
            return R.error("登录失败");
        }

        //密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(passwordMd5)){
            return R.error("登录失败");
        }

        //查看员工状态，如果已经禁用，则返回员工已禁用结果
        if (emp.getStatus() == 0){
            return  R.error("账号已禁用");
        }

        //登陆成功，将员工id存入Session并且返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());//放入Session
        return R.success(emp);
    }

    /*
    * 退出的方法
    * */

    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }



    /*
    * 新增员工
    *
    * */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee employee){
        log.info("新增员工，员工信息：{}",employee.toString());

        long id = Thread.currentThread().getId();//获取线程id
        log.info("线程id为：{}",id);

        //设置初始密码123456，需要进行md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        //获取当前登录用户的id
        Long empId = (Long) request.getSession().getAttribute("employee");

        //employee.setCreateUser(empId);

        //employee.setUpdateUser(empId);

        employeeService.save(employee);
        return R.success("新增员工成功");
    }





    /*
    *
    * 员工信息分页查询
    * */
    @GetMapping("/page")
    public R<Page> pageR(int page,int pageSize,String name){
        log.info("page = {},pageSize = {},name = {}",page,pageSize,name);

        long id = Thread.currentThread().getId();//获取线程id
        log.info("线程id为：{}",id);

        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new  LambdaQueryWrapper<Employee>()
                .like(name != null,Employee::getName,name);
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        //执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }



    /*
    * 根据id修改员工信息
    * */
    @PutMapping
    public R<String> update(HttpServletRequest request, @RequestBody Employee employee){
        log.info(employee.toString());

        long id = Thread.currentThread().getId();//获取线程id
        log.info("线程id为：{}",id);


        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser((Long) request.getSession().getAttribute("employee"));

        employeeService.updateById(employee);
        //如果修改不成功，但是没有报错，可能是js对long型数据进行处理时丢失精度，
        //导致提交的id和数据库的id不一致

        return R.success("员工信息修改成功");

    }




    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        Employee employee = employeeService.getById(id);
        if(employee != null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
